Not only can water float a boat, it can sink it also

Not only can water float a boat, it can sink it also.

Every thing has a dual nature. Humans too. Depends on us to be good or evil, strong or weak.

Similar sayings:

Whenever the water rises, the boat will rise too Whenever the water rises, the boat will rise too
How can you put out a fire set on a cart-load of firewood with only a cup of water How can you put out a fire set on a cart-load of firewood with only a cup of water
Water that has reached its level does not flow Water that has reached its level does not flow
Do not have each foot on a different boat Do not have each foot on a different boat
One monk shoulders water by himself; two can still share the labor among them When it comes to three, they have to go thirsty One monk shoulders water by himself; two can still share the labor among them When it comes to three, they have to go thirsty